<?php 

header("content-type: text/html; charset=utf-8");

function call_fun($task, $x, $y) {
	call_user_func($task, $x, $y);
}

say(1, 2);
echo "<br/>";

function say($x, $y) {
	echo $x.",".$y;
}

call_fun("say", 1, 2);
?>
